Perkoa is comprised of an underground mine and a milling plant of 700kt/a. In August 2014, following the approval by Blackthorn Resources' shareholders, the sale of the company's remaining equity interest in the Perkoa mine to Glencore was completed for settlement proceeds of US$10 million. In August 2017, Trevali Mining acquired a portfolio of zinc assets from Glencore in which one asset was the Perkoa mine. Wood Mackenzie’s asset reports are built from the bottom up, incorporating a number of granular data metrics to ultimately produce our industry standard cash operating costs. This report contains a detailed asset note giving you a holistic view of the asset, including an operational overview through to a timeline of events from inception to now. This qualitative analysis is supplemented by the associated Excel download which enables interrogation of a whole series of cost and production metrics over the life of the asset.